JPH0324846Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fuel injection governor device for a diesel engine.

Various measures have been devised to reduce lever pressure in conventional all-speed governors to improve operability. A cancel spring mechanism is one of them. That is, as shown in FIG. 1, a cancel spring 3 is connected to a triangular plate 2 provided on a control lever 1.

Figure 2 shows a mechanical all-speed governor. When the control lever 1 is tilted to the high rotation side A to a certain angle, the tension lever 6 is pulled to the left via the governor spring 7, and the guide lever 9 attached to the sleeve 12 is pulled to the left. A floating lever 10 whose one end is rotatably connected to the governor housing is connected to the guide lever 9. Therefore, the other end of the floating lever 10 pushes the rack in the direction of fuel increase.
Engine output increases and rotation also increases. As the rotation increases, the force pushing the sleeve 12 of the flyweight 5 to the right increases.

With this mechanism, control lever 1
By keeping the angle at a suitable angle, the engine speed can be maintained at a certain rotational speed.

Generally, the lever reaction force corresponds to the force with which the control lever 1 pulls the governor spring 7. This force becomes maximum when the control lever 1 falls to the highest rotation side A.

The function of the cancel spring 3 shown in FIG. 1 is to reduce this lever reaction force.

However, in this case, as you move the control lever 1 toward the high rotation side A, the rate of increase in the lever reaction force slows down (see Figure 3 A and B).Therefore, when you step on the accelerator, you may feel that the force loosens at a certain point. receive. Note that Figure 3 C and D show the normal case.

The present invention was developed in view of the above circumstances, and its purpose is to apply a spring force against the control lever when it falls to a certain angle on the high rotation side A.
The objective is to keep the increase rate of lever reaction force constant in proportion to engine rotation speed and improve axle feeling.

Hereinafter, the present invention will be explained with reference to FIG. 4 and subsequent figures. In the drawing, 20 is a full speed set bolt, and this full speed set bolt 20 is provided with a bolt body 22 that is screwed into a governor body 21, and the inside of this bolt body 22 is formed into a spring chamber 23. A stopper 24 is provided at the entrance of the spring chamber 23.
is provided. A spring receiving portion 26 of a push rod 25 is inserted into the spring chamber 23.
A spring 27 is housed inside, and the spring 27 causes the push rod 25 to protrude toward the control lever 26 side. 27 is a set bolt, 28 is a triangular plate provided on the control lever 26, and 29 is a cancel spring.

The other structure of the fuel injection governor according to the present invention is the same as that shown in FIG.

When the control lever 26 falls to a certain angle toward the high rotation side A (point a in Fig. 6)
and the control lever 26 is pushed to the push rod 25.
When the spring 2 comes into contact with the
7 is compressed.

Therefore, when the engine speed reaches point a in FIG. 6, the lever reaction force becomes F, and the shaded area is improved compared to the lever reaction force F' in the conventional device.

Further, the lever reaction force increase rate B becomes constant.

By changing the spring constant of the spring 27, the slope of the lever reaction force F can be changed.

The present invention has been described in detail above, and is a fuel injection governor device in which a control lever 26 is connected to a cancel spring 29 for reducing the reaction force of the control lever 26. A push rod 25 is provided on the full speed set bolt 20 that regulates the maximum inclination angle, facing the control lever 26, so as to be movable in the axial direction of the full speed set bolt 20 and biased by a spring in the projecting direction. Since the length of is configured such that the control lever 26 comes into contact with the control lever 26 in the middle of the tilting movement toward the high rotation side,
When the control lever 26 falls to the high rotation side and operates, the biasing force of the spring 27 is added to the biasing force of the cancel spring 29 and acts against it from the point where the control lever 26 has tilted to a certain angle. The increase rate of the lever reaction force on the high rotation side becomes constant in proportion to the engine rotation speed, making it possible to improve the accelerator handling.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the configuration of the cancel spring mechanism of a conventional fuel injection governor, Fig. 2 is an explanatory diagram of the fuel injection governor, Fig. 3 is an explanatory diagram of lever reaction force and lever reaction force increase rate, and Fig. 4 is an illustration of the lever reaction force increase rate. FIG. 5 is a longitudinal sectional view of the full speed set bolt, and FIG. 6 is an explanatory diagram of lever reaction force and lever reaction force increase rate. 20 is the full speed set bolt, 25 is the push rod, 26 is the control lever, and 27 is the spring.

Claims (1)

[Scope of utility model registration request] In a fuel injection governor device in which a control lever 26 is connected to a cancel spring 29 for reducing the reaction force of the control lever 26, a full speed set bolt 20 regulates the maximum angle of inclination of the control lever 26 toward the high rotation side. Then, move the push rod 25 opposite the control lever 26 to the full speed set bolt 2.
The push rod 25 is provided so as to be movable in the axial direction of 0 and biased by a spring in the direction of protrusion, and the length of the push rod 25 is such that the control lever 26 comes into contact with the control lever 26 in the middle of its tilting motion toward the high rotation side. Features a fuel injection governor device.